Mining-tool



(MMM 1v1. HARDSOGG.

MINING TOOL. No. 520 000. Patented May 15, 1894.

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UNITED STATES PATENT OFFICE.

MARTIN HARDsooG, or oTTUMwA, IowA.

MINING-TOOL..

SPECIFICATION forming part of Letters Patent No. 520,000, dated May l5,1894.

Application filed J'nly 10, 1893. Serial No. 480,052. (No model.)

To @ZZ whom it may concern:

Be it known that I, MARTIN HARDsoCG, of Ottumwa, Iowa, have inventedcertain new and useful Improvements in Mining-Tools, of which thefollowing is a specification.

The object'of my invention is to provide a simple, economical andefficient mechanism for locking the ferrule and pick or hammer of amining tool together; and it consists in the features and details ofconstruction hereinafter described and claimed.

In the drawings, Figure l is a side elevatlon of my improved lockingdevice applied to a miners pick; Fig. 2 a side elevation of the sameapplied to a hammer; Fig. 3 an enlarged sectional detail taken on line 3of Fig. l; Fig. 4 a perspective View of the key or wrench used inconnection with the locking bolt; Fig. 5 an enlarged perspective view ofthe ferrule; Fig. 6 an enlarged perspective view of a portion of thepick; Fig. 7 a perspective View of the locking bolt; and Fig. 8 asectional View showing a modied form of my locking bolt.

In the ordinary construction of miners tools-like picks, knappinghammers, axes, ccf-the main portion of the tool and ferrule aregenerally formed in one piece, so that the handle and tool become oneconsolidated structure. The objections to this form of tool are that inrepairing, the entire tool, including the pick, ferrule and handle, haveto be sent to the shop to be repaired, as well as tak- Ing up a greatdeal of space in shipping the tools with their handles. It is the designof my invention to obviate these objections, and to provide a miningtool with a ferrule so constructed as to be interchanged with any numberof diierent kinds of tools, so that one handle may be used in connectionwith the pick, knapping hammer or hatchet and ax,

thus reducing the cost of an entire set of tools,

as Well as making them easier to handle while repairing or sharpening.

As illustrated in the drawings, I have preferred toshow my improvedmechanism adapted to be used in connection with a miners pick andknapping hammer.

In constructing my improved locking de- Vice, I take a pick-ax or hammerhead A, and provide it with a dovetailed recess B, preferablywedge-shaped-that is, the opening at one side, b, is wider than theopening at the other side, b. I provide the usual ferrule, C, with adovetailed slide D, adapted to lit the recess of the pick, so that, asit is drawn forward, it will be wedged tightly in place. To securelylock the ferrule and pickax or hammer head together, I provide a lockingbolt E, with a threaded portion e, adapted to enter a threaded opening Fin the ferrule, and have its Iianged head e impinge against a shoulderb2 in the pickax or hammer head, so that when the locking bolt isrotated in one direction, this head will impinge against the shoulder inthe pick ax, and act to draw the wedgeshaped slide of the ferrule intolocking engagement with the recess in the pickax. I provide the lockingbolt with a square axial opening e2, adapted to Ireceive the wrench G,for the purpose of rotating the bolt and locking or unlocking theferrule and head. The head of the lockingbolt is preferably flattened atone side, as at e3, so that the bolt may be turned to have its iiattenedportion coincide with the upper portion of the slide, when the same isplaced in the recess of the pickax o hammer head. f

In Fig. 8 I have shown a modified form of my locking bolt, whichconsists in providing it with a smooth, cylindrical portion H, adaptedto tit an opening in the ferrule, and provided at one end with acircular nut h,which` may be held in position by any convenient method,and a cam-shaped head h', at the other end, adapted to impinge againstthe shoulder, b2, in the pickax or hammer head. The locking bolt isprovided with the usual square opening e2, shown in Fig. 7, so that onturning the same, the cam portion, h2, will impinge against the shoulderof the pickax or hammer head, and act to securely lock the ferrule andhead together.

While I have described my invention more or less minutely as to details,I do not desire to be limited thereto unduly, any more than is pointedout in the claims. On the contrary, I contemplate changes in form,construction and arrangement, and the use of equivalents as occasion mayWarrant or necessity demand.

I claim- 1. In mining tools, the combination of a main portion formingthe ax or hammer head, and a ferrule adapted to receiveahandle, one

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portion provided with a Wedge-shaped dovetailed recess and the otherwith a. Wedgeshaped dovetailed slide adapted to fit the same, andmechanism to securely hold both portions together, substantially asdescribed.

2. In mining tools, the combination of a main portion forming the ax orhammer head, and a ferrule adapted to receiveahandle, one portionprovided with a Wedge-shaped dovetailed recess and the other with aWedge shaped dovetailed slide adapted to fit the same, and a lockingbolt to securely hold both portions together, substantially asdescribed.

3. In mining tools, the combination of a main portion forming the aX orhammer head,

and a ferrule adapted to receive a handle, one portion being providedwith a Wedge-shaped dovetailed recess and the other with a slide.

adapted to t the same, and a locking bolt having a threaded portion,adapted to fit a threaded opening in the ferrule, and provided -Withaiianged head adapted toimpinge against MARTIN HARDSOCG.

W'itnesses:

THOMAS F. SHERIDAN, SAMUEL E. l-IIBBEN.

